1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.util;
24  
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  import com.liferay.portal.kernel.util.Base64;
28  import com.liferay.portal.kernel.util.Digester;
29  
30  import java.io.UnsupportedEncodingException;
31  
32  import java.security.MessageDigest;
33  import java.security.NoSuchAlgorithmException;
34  
35  import org.apache.commons.codec.binary.Hex;
36  
37  /**
38   * <a href="DigesterImpl.java.html"><b><i>View Source</i></b></a>
39   *
40   * @author Brian Wing Shun Chan
41   */
42  public class DigesterImpl implements Digester {
43  
44      public String digest(String text) {
45          return digest(Digester.DIGEST_ALGORITHM, text);
46      }
47  
48      public String digest(String algorithm, String text) {
49          MessageDigest digester = null;
50  
51          try{
52              digester = MessageDigest.getInstance(algorithm);
53  
54              digester.update(text.getBytes(Digester.ENCODING));
55          }
56          catch (NoSuchAlgorithmException nsae) {
57              _log.error(nsae, nsae);
58          }
59          catch (UnsupportedEncodingException uee) {
60              _log.error(uee, uee);
61          }
62  
63          byte[] bytes = digester.digest();
64  
65          if (_BASE_64) {
66              return Base64.encode(bytes);
67          }
68          else {
69              return new String(Hex.encodeHex(bytes));
70          }
71      }
72  
73      private static final boolean _BASE_64 =
74          PropsValues.PASSWORDS_DIGEST_ENCODING.equals("base64");
75  
76      private static Log _log = LogFactoryUtil.getLog(Digester.class);
77  
78  }